Furnace door



Aug. 12. 1924.`-

F. E. wERTHz-:IM ET AL A FURNAGE DOOR FJ' led Dec. 2l 1922 Patented Aug. 12, 1924.

UNITED STATES PATENT OFFICE.

FERID ELIEL WER'II-IEIM, OF CHICAGO, AND ASHU'R URL WEIHERBEE, OF EVANSTON, ILLINOIS, ASSIGNORS TO WILLIAM A. GILCIIRIST, OFNEW YORK, N. Y.

FURNACE DOOR.

Application led December 21, 1922.

part thereof.

This invention relates to furnaces and has for its object broadly, to provide a door that will effectually close the furnace and can be easily and quickly opened and closed.

More specifically, it is an object of the invention to loosely mount the door on the furnace and provide quick acting wedging devices for forcing it tightly against the door frame. Further objects and advantages of the invention will become apparent as the description is read in connection with the accompanying drawings illustrating a selected embodiment of the invention and in which Fig. 1 is a front view of the door and door frame, sho-wing the door closed and the wedging devices in operative position;

Fig. 2 is an end elevation looking from the right in Fig. 1;

Figs. 3 andv 4 are sectional 'views taken on the lines 3 3 and 4-4 of Fig. 1; and

Fig. 5 is a perspective view of the bushing for adjusting one of the wedging devices.

Referring to the drawings, indicates a door frame, preferably of angular cross section, to provide a flange 11 adapted to be set in the furnace wall, and a flange 12 adapted to rest against the face of the furnace wall. At one side of the door frame the flange 12 is equipped with hinge lugs 14 and 15, adapted to support an intermediate hinge leaf or member 16 having hinge lugs 17 and 18 resting upon the lugs 14 and 15 and pivoted thereto by a pin 19. The door 20 is equipped with a hinge lug 21, resting on top of the intermediate hin e member 16, and a similar lug 22 seated 1n a notch 23 in the hinge member 16, and a pin 24 pivots the door to the intermediate hinge member. The opposite side of the door frame 10 is equipped with a catch 25, adapted t0 receive a latch 26 on the door. A handle 27 of any suitable kind is Serial No. 608,332.

Vprovided to facilitate the swinging of the door about its hinged mounting.

The door frame opposite to the hinged edge of the door is equipped with a boss 28, in which is mounted a pivot pin 29 on which is a swinging clamping head 30, carrying a we-dging device here shown as a screw 31,

equipped with handles 32 and adapted to bear against the edge 33 of the door and force it tightly against the face of the door frame. The boss is preferably provided with ribs 35 and 36 adapted to cooperate with the lug 37 on the head 30, to limit its clock-wise motion towards inoperative position, and its counter clock-wise motion towards operative position.

Between the hinge lugs 14 and 17, the hinge pin 19 is equipped with spacing bushings 38 and 39, and between these bushings is pivoted a wedging device in the form of a lever having a long arm 40 adapted t0 serve as a handle, and a short arm 41 adapted to have wedging engagement with the hinged edge of the door 12. As shown, this edge of the door is provided with an arm 42, reinforced by webs 43, and provided with a bearing surface 44 adapted to lc0- operate with an eccentric surface 45 on the arm 41.

In order to permit an adjustment of this wedging device, the lever is provided with an eccentric bushing 46, having a head 47 provided with flat faces to receive the wrench by which the bushing may be rotated to increase or decrease the effective length of the wedging arm 41. A screw 48, threaded through the lever, serves to hold the bushing in an adjusted position.

Preferably the door frame is equipped with a groove 49, which, together with the face 50 of the door, forms a pocket surrounding the joint between the door and the door frame to receive clay, asbestos or other packing 51, by which the joint is made gas-tight. The meeting faces 52 and 53 of the door and the door frame, may be machined or otherwise surfaced to make a very close joint.

By thus loosely mounting the door on the furnace, and providing powerful wedging devices to force it into intimate and tight engagement with the door frame, the door is made to effectually close the furnace opening, and by the addition of the packing 51 the joint is made absolutely gas-tight. The

wedging device, including the head 30 and Ithe'screw 3l, can be quickly thrown into operative position and set up by the powerful, leverage afforded by the arms 32 and the pitch offthe screw. At the same time it Y can be quickly released and thrown into in- Y door.

, handle to the right. When, due to wear, or,

in the original setfup the action of the short arm 41.' ofthelever, is-ins'uiiicient,the bushing' 48 can be'rotated by means of a wrench :or the lile'togive the arm Il the necessary VVe'claiinfas our invention:

f1. VIna furnace, the combination of a door frame,- a door loosely mounted on the frame, and means Vfor forcing the door tightly against the framek including a lever pivoted on 'the frame and having an arm serving as alhandle-"and another arm' adapted to Yhave wedging engagement with the door as the lever is rotated."A

-` 2. 'In a furnace,-the combination of a door V frame, a' door loosely mounted on the frame,

and Vmeans for vforcing ,the door tightly 'againstl the frame', including a lever pivoted on theframe and vhaving an arfm serving as y a, handle and another' arm adapted to have wedging engagement-with the door as the lever is rotated, and means for 'adjusting the-'throw of the lever.

In a furnace, the combination of a door vframe, a door, a double pivot hinge mount `ing saidvdoor on the frame, and means for forcing the door against the door frame, including a lever' "pivoted on the'frame adj acent to the hingedredge of the door and hav- :ing a long armY serving as a handle, and a short arm having a surface eccentric with Y "i 4;. 'In a furnace, the combination of a door frame, and a lever pivoted on the frame and having a short arm presenting a surface eccentric with respeet to its pivot for wedging engagement with the door.

6. In a furnace, the combination of a vdoor frame, a door loosely mounted on the door frame, a lever pivoted on the frame and having a short arm presenting a surface eccentric with respect to its pivot for wedging engagement with the door, and an eccentric bushing adjustably mounted in said lever.

7. In a furnace, the combination of a door frame, a door loosely hinged at one edge to said frame, a head pivoted on the frame to swing into and out of the path of the door, a wedging devicecarried by the head for forcing thel door against the frame, and a second wedging device on the opposite side of said door.

8. In a furnace, the combination of a door frame, a door loosely hinged at one ed e to said frame by a'double pivot hinge, a lead pivoted on the frame to swing into and out of the path of the door, a screw in the head adapted to engage the door, and a lever adapted to coact with said screw to hold said door in contact with said frame.

. 9. In a furnace, the combination of a door loosely hinged on the frame, a lever pivoted onV the frame adjacent to the hinge and having ashort arm' for engagement with the door, a head pivoted on the frame opposite tothe hinge, to swing in front of the door, and a screw in the head for engagement with the door. respect to its pivot for wedging engagement with` the door.

FERD ELIEL WERTHEIM. YAsHun URL WETHERBEE. 

